完成新建设备的单元 测试包括，添加变量表，和添加菜单

DMS.Infrastructure/Entities/DbMqttServer.cs

@@ -2,21 +2,79 @@ using SqlSugar;
 
 namespace DMS.Infrastructure.Entities;
 
+/// <summary>
+/// MQTT服务器配置实体
+/// </summary>
 public class DbMqttServer
 {
+    /// <summary>
+    /// 唯一标识符
+    /// </summary>
     [SugarColumn(IsPrimaryKey = true, IsIdentity = true)]
     public int Id { get; set; }
+
+    /// <summary>
+    /// 服务器名称
+    /// </summary>
     public string ServerName { get; set; }
+
+    /// <summary>
+    /// MQTT代理地址
+    /// </summary>
     public string BrokerAddress { get; set; }
+
+    /// <summary>
+    /// 端口号
+    /// </summary>
     public int Port { get; set; }
+
+    /// <summary>
+    /// 用户名
+    /// </summary>
     public string Username { get; set; }
+
+    /// <summary>
+    /// 密码
+    /// </summary>
     public string Password { get; set; }
+
+    /// <summary>
+    /// 是否激活
+    /// </summary>
     public bool IsActive { get; set; }
+
+    /// <summary>
+    /// 订阅的主题
+    /// </summary>
     public string SubscribeTopic { get; set; }
+
+    /// <summary>
+    /// 发布的主题
+    /// </summary>
     public string PublishTopic { get; set; }
+
+    /// <summary>
+    /// 客户端ID
+    /// </summary>
     public string ClientId { get; set; }
+
+    /// <summary>
+    /// 创建时间
+    /// </summary>
     public DateTime CreatedAt { get; set; }
+
+    /// <summary>
+    /// 连接时间
+    /// </summary>
     public DateTime? ConnectedAt { get; set; }
+
+    /// <summary>
+    /// 连接持续时间（秒）
+    /// </summary>
     public long ConnectionDuration { get; set; }
+
+    /// <summary>
+    /// 消息格式
+    /// </summary>
     public string MessageFormat { get; set; }
 }